Proposal: Add an option to include all licenses in one file

[maxlazio]

Description

We had multiple users requesting one file which contains all the generated licenses for their internal approving processes.

This PR is more of a proposal to see if this use case would be acceptable for more users, the code is written to demonstrate how this might look.

If license_compiled_output true, the main LICENSE file would contain the actual text from each individual license, otherwise the behaviour remains the same.

My questions would be: Would something like this be useful to more omnibus users and the maintainers? If yes, how could this be improved to be accepted? If no, thanks for reading :)

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/cc @chef/omnibus-maintainers <- This ensures the Omnibus Maintainers team are notified to review this PR.

[brodock]

@chef/omnibus-maintainers is there any intention of accepting this? we are maintaining this change in our internal fork

[tas50]

@maxlazio @brodock This is actually the direction I'd like to take our builds. Any chance you can rebase this so I can give it some local testing?

[lamont-granquist]

obviously needs a rebase and needs fixing, but i'm cool with it.